I don't think anyone is bending over backwards, the simple fact is the presence of an alien megastructure doesn't make sense as a first conclusion. If it turned out to true, we would then be in the more difficult position of figuring out WHY so many other observations are what they are. Whenever you are considering a new result, you have to look at the already collected data to make an informed conclusion.
I'm referring in particular to the Fermi Paradox, the key points of which is this: given the number of stars in the galaxy, the very brief time it takes for intelligent life to evolve, and the amount of time that has passed since the first planets, we should expect to see a proliferation of alien structures, if in fact any other lifeforms anywhere in the galaxy has ever achieved interstellar travel. It took life on earth 3.5 billion years to produce humans, and all of modern human technology (including rudimentary interplanetary travel) can be summarized in just 3,000 years. If/once we reach interstellar capabilities, the amount of ground we can cover in a few thousand years is mind boggling, let alone a million or billion years.
The oldest observed exoplanet is 12.8 billions years old, so we know the planetary phase of our universe began way before Earth came around, so where the heck is everyone? Only one single planets would need to have reached near-future tech in the last 12 billion years to have populated the whole galaxy by now.
The fermi paradox is far from a certainty, and there are arguments against it, but it is generally consistent with our understanding of the timescales involved, the processes involved, and the dynamics of population expansion. That being the case, it would be very hard to explain ONE megastructure around one star when we haven't already seen tons of them all over the place. Doesn't mean it can't happen, but it is one reason why it doesn't make sense as a first conclusion.